基于域变换的雷达主瓣密集转发干扰抑制方法研究

Research on Radar Main Lobe Dense Repeater Jamming Suppression Method Based on Domain Transform

雷达主瓣经常面临干扰机发射的密集转发干扰,难以对其进行有效抑制。文中提出了一种基于域变换的雷达密集转发干扰抑制算法,在变换域中抑制干扰。该方法首先对雷达回波信号进行去斜处理,将转发干扰转变为单频干扰;然后,将信号分段构造成矩阵进行奇异值分解,将回波信号转换到变换域;最后,利用奇异值差分谱进行奇异值选择,重构目标回波信号,从而实现干扰抑制。通过仿真验证了该方法的有效性。

The main lobe of radar is often faced with the dense repeater jamming emitted by jammer,which is difficult to suppress effectively. A radar dense repeater jamming suppression algorithm based on domain transform is proposed to suppress jamming in the transformed domain. In this method,the radar echo signal is first processed by Stretch processing,and the repeater jamming is transformed into single-frequency jamming. Then,the signal is piecewise constructed into matrix for singular value decomposition,and the echo signal is converted to the transformation domain. Finally,the singular value differential spectrum is used to select the singular value,which reconstructs the target echo signal,so as to achieve jamming suppression. Simulation results show the proposed method effectiveness.